GHSA-qh54-9vc5-m9fg
LOWMD5 hash support in github.com/foxcpp/maddy
Blast Radius
github.com/foxcpp/maddyReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Impact
This vulnerability affects maddy 0.5.1, 0.5.0 users using auth.shadow module and an extremely outdated system that still allows MD5 hashes in /etc/shadows.
Patches
Patch is available as part of the 0.5.2 release.
Workarounds
Ensure MD5 hashes are not present in /etc/shadow.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/foxcpp/maddy | ≥ 0.5.0&&< 0.5.2 | 0.5.2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/foxcpp/maddy. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/foxcpp/maddy to 0.5.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qh54-9vc5-m9fg is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-qh54-9vc5-m9fg is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-qh54-9vc5-m9fg. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-qh54-9vc5-m9fg in your dependencies?
O3 detects GHSA-qh54-9vc5-m9fg across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.